Rendering antialiased shadows with depth maps

Reeves, William T.; Salesin, David; Cook, Robert L.

doi:10.1145/37401.37435

Cited by 244 publications

(104 citation statements)

References 22 publications

Supporting

Mentioning

104

Contrasting

Order By: Relevance

“…In order to prevent a mismapping, we adopt a render approach comparable to shadow maps [10], [11]. The main idea is to store the closest geometry portion w.r.t.…”

Section: Hidden Surface Removalmentioning

confidence: 99%

Data-Fusion of PMD-Based Distance-Information and High-Resolution RGB-Images

Lindner

Kolb

Hartmann

2007

2007 International Symposium on Signals, Circuits and Systems

View full text Add to dashboard Cite

Abstract-An important field of reasearch in computer vision is the 3D analysis and reconstruction of objects and scenes for e. g. position determination, online object recognition or collision prevention. Known techniques thereby mainly rely on measuring devices such as laser scanners, stereo camera systems, or comparable algorithms like structure from motion.The rather new Photonic Mixing Device (PMD) technique is based on the time-of-flight principle and measures full-range distance information in real-time. Unfortunately, PMD-based devices have still limited resolution (e. g. 160 × 120 px) and provide only graylevel information. This paper describes a fast algorithmic approach to combine high resolution RGB images with low resolution PMD distance data, acquired using a binocular camera setup. The approach relies completely on fast parallel Graphics Processing Units (GPUs) ressources. Additionally, we introduce a simple but efficient method to detect insufficient color assignments, which are due to the binocular setup.The resulting combined RGBZ-data not only enhances the visual result, but also represents a basis for advanced data processing in e. g. object recognition.

show abstract

“…In order to prevent a mismapping, we adopt a render approach comparable to shadow maps [10], [11]. The main idea is to store the closest geometry portion w.r.t.…”

Section: Hidden Surface Removalmentioning

confidence: 99%

Data-Fusion of PMD-Based Distance-Information and High-Resolution RGB-Images

Lindner

Kolb

Hartmann

2007

2007 International Symposium on Signals, Circuits and Systems

View full text Add to dashboard Cite

show abstract

“…With PRMan, if you want a light to be shadowed, you need to use a light source shader which explicitly references a shadow depth map to determine if the light is shadowed from a particular point [11]. The user needs to compute this shadow map ahead of time by rendering the scene as a depth image from the point of view of each light source which casts shadows.…”

Section: ] # This Polygon Does Not Emitmentioning

confidence: 99%

BMRT: A Global Illumination Implementation of the RenderMan Standard

Gritz¹,

Hahn

1996

Journal of Graphics Tools

View full text Add to dashboard Cite

The RenderMan Interface specification proposed by Pixar is a standard for communication between modeling software and rendering software or devices. This standard has proven very powerful and is extremely popular in production work. Although the standard itself claims not to specify a rendering algorithm, people have speculated RenderMan and global illumination are mutually incompatible.We have implemented a rendering system which fully adheres to the RenderMan Interface and uses global illumination algorithms.Specifically, this implementation supports progressive refinement radiosity and distribution ray tracing in a two-pass approach. This rendering system is widely distributed, very popular, and has been used in production (three properties usually not found in global illumination renderers). We discuss how we overcame problems in mating global illumination algorithms with the RenderMan standard, and make recommendations for future versions of the standard to better accommodate such algorithms. We also present a summary of important lessons we learned by creating and distributing this tool.

show abstract

“…Shadows can be found, as in Williams [12] and Reeves et al [13], using a zbuffer from the point of view of the light source, reconstructed as described above from the same precomputed views. Currently we have only implemented an infinite light source for the sun, using parallel projection in the reconstruction, but for other applications, a finite light source could easily be implemented using perspective projection.…”

Section: Normals Shading and Shadowsmentioning

confidence: 99%

Rendering Trees from Precomputed Z-Buffer Views

Max

Ohsaki²

1995

Eurographics

View full text Add to dashboard Cite

Abstract. Parallel projection z-buffer images are precomputed for a number of preset viewing directions on the unit sphere. Using the depth information, we can reconstruct a 3-D point from each image pixel. Then parallel or perspective views can be found from any other viewpoint by rotating the 3-D points from the nearest three or four precomputed views into the proper position and projecting them onto an output z-buffer. A temporary z-buffer image, constructed in the same way for a viewpoint at the light source, is used for a z-buffer shadow algorithm. The rendering algorithm is applied to broad leaf and needle leaf trees, and tested in animation. Our rendering algorithm is similar to that in Chen and Williams [1], with differences listed below.

show abstract

Rendering antialiased shadows with depth maps

Cited by 244 publications

References 22 publications

Data-Fusion of PMD-Based Distance-Information and High-Resolution RGB-Images

Data-Fusion of PMD-Based Distance-Information and High-Resolution RGB-Images

BMRT: A Global Illumination Implementation of the RenderMan Standard

Rendering Trees from Precomputed Z-Buffer Views

Contact Info

Product

Resources

About